I'm fine with exclusives, but timed exclusives are kinda lame, like, if you're gonna release your game to other platforms, but are holding it hostage for a while just for your own platform's gain, that's lame
If you just cut out the middle man and release the game on multiple platforms like you're going to anyway, you'll likely be making even somewhat more money (depending on how the money is split between companies) that way than just keeping a game to yourself for a while just to promote your own platform, because there will be more options for your consumers